Tape actuating device



W. J. ZENNER TAPE ACTU'ATING DEVICE Original Filed Feb. 10, 1952 INVENTOR wan-2 .1 ZENNEB 'flkb AfTORNE f M I I I n Jan. 18, 1938.

Reissued Jan. 18,1938 i I Re. 201526 TAPE ACTUATING DEVICE Walter J. Zenner, Des Plaines, 111., mmto Teletype Corporation, Chicago, III., a corporation of Delaware Original No. 1,973,839, dated September 1 8, 1934,

Serial No. 592,006, February 10, 1932. Application for reissue March 20, 1935, Serial No.

34 Claims. (Cl. 178-42) This invention pertains to projection systems suing disclosure when considered in connectionv and apparatus therefor and more particularly to with the preferred embodiment thereof as illustape actuating devices of the type employed for trated in the drawing in which: imparting continuous movement to the paper Fig. 1 is a schematic diagramillustrating the strip through telegraph recording devices and application of the present invention to a'projec- 5 projecting machines. tion system.

It has been found to be desirable in many bro- Fig. 2 is a perspective view of the preferred kerage oiiices to project upon a screen the inforembodiment of the invention supplemented by a mation received upon a ticker tape, so as to acfragmentary view of the selector or main operatcommodate simultaneously a greater number of ing shaft in a recorder andthe electrical inter- 10 observers. To accomplish this result a transconnections therefor.

parent or translucent tape is utilized, and'sub- Fig. 3 is a longitudinal sectional view of the sequent to printing or recording thereon the tape main drive shaft and the mechanism thereon.

is caused to pass through a projection machine. Fig. 4 is an elevational view of the retard-stop It is well known that normally the movement of device. 15 the tape through the recording device or ticker In the general arrangement the projecting is controlled by a so-called spacing mechanism machine is preferably juxtapositioned to the integral with the device and that intermittent recording device so as. to reduce to an absolute or step-by-step motion is thereby imparted to the minimum the time transpiring between the mak- 2n tape. Such irregular movement of the tape proing of the record and the appearance of that recduces on the screen a running account of the 0rd on the screen. The maintenance of a miniticker information which proceeds along the mum distance between the recording device and screen spasmodically and thus is not conducive the projector is highly desirable so as to preclude to easy reading; in fact, the constant agitative the possibility of delaying the presentation of the :5 motion of the image on the screen might fatigue information upon the screen after the recording the observer. operation. If the projector is not so placed there The main object of the present invention is to is great likelihood that the information contained impart to the tape a continuous movement at a on the portion of the tape between the recorder speed consistent with the effective operation of and projector will be suppressed until such a :t'.) the recording device. time when further recordations are made which, To produce the desired result the present in in the event of an inactive market might not vention contemplates the dispensation of the occur until after a considerable lapse of time. I spacing mechanism of the recording device and a As exemplified in Fig. 1, the tape supply is tape-actuating device is provided in accordance derived from a tape spool ll located either in- :T, with the present invention whereby the tape is teriorly or exteriorly of a printing unit I! which 5 given a continuous motion during the recording may be of a type similar to that disclosed in operations and is arrested automatically upon Patent No. 1,745,633, issued February 4,.1930 to the cessation of recording operations for a pre- 5. Morton et al. The tape III is passed over a determined period. platen ll of the printing unit, thence through an -1 l In accordance with the present invention the adjacently disposed projector ll, from whence it 'projecting machine is interposed between the passes over a tape guide l5, around a guide roller recording device and the tape actuating device, i6, through tape engaging means I'I to a reel i8 such that the tape is drawn through the printing of a tape take-up device which is in the present zone of the recording device; thence immediately embodiment located on the tape actuating device.

-I 3 through the projector to the tape-engaging mem- Directing attention to Fig. 2, which illustrates ber of the tape actuator. It is, of course, manithe tape actuating device, it is observed that this fest that the tape actuating device may be incordevice comprises a motor II which is adapted porated in the printing unit and operated thereto impart through a pinion 22 mounted on the from by the same source of power, in which event armature shaft thereof continuous motion to a I) the tape would be directed in the same manner worm gear 23 carried on a main drive shaft 24 as aforesaid except that it would be returned to which is journaled in bearings mounted in the printing unit to engage the tape actuator brackets 25 and 26 supported on the base 20 of therein. the tape actuating device.

The foregoing and further objects of the pres- A longitudinal sectional view of the main drive ent invention will become apparent from the enshaft and the mechanism partied thereon is 55 shown in Fig. 3. The worm gear 23 is fixed to a flanged collar 21 which in turnis fixedly mounted on the drive shaft 24. Loosely mounted on the main drive shaft 24 is a sleeve member 23 im tegral with which is a ratchet.23. The end of the sleeve'member 23 opposite the ratchet 23 is reduced in diameter to receive a gear 3| which is tightly held on sleeve 23 by means 01 nut 32 and locknut 33 mounted on the threaded portion of the sleeve. The end of'the sleeve 23 adjacent to the nut 33 is provided with two diametrically disposed notches into which is received the rib of a disc member 34'. Interposed between the disc 34 and a flanged collar 33 pinned to the main drive shaft 24 is a disc of friction material.-

A disc 33 is keyed to the shaft 24 adjacent to the ratchet 23 and disposed between disc 33 and ratchet 23 is disc 31 of friction-material. A helical compression spring 33 is carried on the drive shaft 24 between the collar member 21 and the disc member 33 and serves to compress discs 34 and 33 and sleeve 23 and the discs of friction material against the collar 35. Thus, it is seen that the sleeve member 23 is frictionally connected to the main drive shaft 24.

The ratchet wheel 23 cooperates with a yielding pawl member 4| as shown in Figs. 2 and 4. Pawl member 4| is slidably mounted on the side of an armature 42 associated with an electromagnet 43 which is carried on a mounting 44 which in turn is supported on a bracket 43. Armature 43 is pivoted at 43 to the mounting 44 and is normally urged in a clockwise direction against the ratchet wheel 23 (as viewed in Fig. 4) by a spring 41, when the magnet 43 is deenergized. As schematically shown in Fig. 2 the electromagnet 43 is electrically connected to a pair of contacts 43 so that it is energized when a circuit is established, upon the closing of contacts 43, from positive battery through contacts 43 thence over wire 43 and through the winding of eiectromagnet 43 to ground. The contacts 43 in the present embodiment are preferably located (though not necessarily) in the printing unit or recorder l4 and are controlled by a contact lever 3| co-, operatively related to a cam 52'integral with sleeve 33 carried on the main operating shaft 54 of a printing unit of the type shown in the previously mentioned patent.

The present invention is designed to be empioyed with a printer or recorder which is selectively operated by means of equal length letter codes or equal length code combinations of signalling conditions or impulses, and in which the elements carried on the main operating shaft are adapted to make one complete revolution each time a character is to be printed; Printers of this type are operated on the "start-stop principle, wherein each group of selecting or code impulses is preceded by a start impulse and followed by a stop impulse, the function ofwhich primarily is to maintain unison between the transmitting apparatus and the printers. In

effect then, a code combination of signalling impulses for all practical purposes may be deemed to comprise a start impulse, live or sixcode impulses (depending upon whether a five-unit or six-unit code is used) and a stop impulse. However, in normal transmission the code signals follow successively and continuously such that a definite time interval. comprising a stop impulse and a start impulse exists between each letter code; thus the present invention contemplates the utilization of this time interval to effect the continuous movement of the tape.

As is well known, the sleeve member 33 makes one complete revolution during the reception of each code combination; that is, the cam member 32 makes one cyclic movement for each. character printed. The position of cam 32 as shown in Fig. 2 is that assumed upon the completion of each cycle and in this position the contacts 43 are open and electromagnet' 43 is deenergized. During the normal reception of the ticker information, the code combinations are received in uniform succession and since the printing stroke is practically instantaneous the reeordation may be made upon a continuously moving tape without blurring or smudging. For this reason the spacing mechanism usually employed in printing devices of the type used in printing telegraph systems may be eliminated and a tape actuating device oi the kind herein described, adapted to impart continuous movement to the tape, may be substituted therefor.

As previously described, the main shaft 24 is constantly rotating. However, the sleeve 23 frictionally carried thereon is held from rotation by the pawl 4| when there is a cessation in the reception of code signals at which time the magnet 43 is deenergized and armature 42 is released. When code signals are again received the cam 52 rotates substantially continuously whereupon the magnet 43 is again energized, but it is momentarily deenergized each time the cam portion gpasses underneath follower roller 55. Of course, upon this deenergization the armature 42 is resignal code combinations so that the pawl 4| approaches but does not reach a stop pin 51 on the armature 42 during such time interval. In this manner the pawl 4| is engaged with and withdrawn from the ratchet 23 in synchronism with the deenergizatlon and reenergization of electromagnet 43 during the time interval between signal code combinations. The yieldability of pawl member 4| is promoted by a spring 33 distended between the laterally disposed lower end of pawl 4| and guide pin 33 integral with armature 42; so that, when the pawl 4| is disengaged or withdrawn from the ratchet 23 spring 53 will cause it to be thrust or protruded upwardly until the bottom of the slot 33 engages a guide pin 3| attached to armature 42. 4

Now, when the time interval between two successive signal code combinations is unduly prolonged either by a momentary delay or by a complete cessation of transmission, the period of deenergization of ,electromagnet 43 and also the period of engagement of pawl 4| with ratchet 23 will be correspondingly prolonged, in which event, the pawl member 4| will not be withdrawn as heretofore but will continue into engagement until it strikes against the stop pin 51, whereupon the rotation of the ratchet 23, and hence sleeve 23, will be arrested until the transmission of code signals shall have again been resumed.

Referring again to Fig. 2, the drive shaft 24 extends to the right (as viewed in Fig. 3) beyond the bracket 23 and carries on its end a grooved pulley 33 fixed thereto. A gear 63 adapted-to auxiliary shalt I'I journaled in brackets II and II. Shaft II extends beyond the bracket II and carries thereon a knurled roller II which comprises a part .of the tape engaging. means II. A tape pressure means II which comprises a U-shaped portion II carried on a stud shaft II mounted in the bracket II is disposed above the roller II. Loosely mounted on the stud shaft II and disposed between the arms of the member II is a pressure roller II. The pressure means II is adapted to press against the roller II by means 01 a spring II. A thumb portion II is provided should it be desired for some reason toefi'ect manually the release of the pressure exerted by the roller II against the tape.

A flanged tape guide roller II is carried on the bracket II adjacent. to the roller II. The tape is passed underneath the guide roller II, thence between the rollers II and II of the tape engaging means, then around the hub II of the reel II of the tape take-up device. As shown in Fig. 2, the reel II is, in the present embodiment, provided with a removable side II carried on a swinging arm II pivotally mounted on the base II. Side II is adapted to be spring-held against the hub II by means of a spring II. The swinging arm II is adapted to be swung outwardly until arrested by the abutting of lug 'II thereon with a stop lug II integral with the base. The purpose of the removable side II is to permit the ready removal of the used or printed tape from the reel without disturbing the continuous movement of the tape through the projection machine, since in the case of a very busy market the messages are received by the recorders continuously for many hours and hence the accumulation of printed tape may become greater than can be readily taken care of bythe limited diameter of the take-up reel.

The tape reel is carried on the extended portion of the shaft II which is journaled in a bracket II secured on the base. The shaft I1 is also adapted to extend beyond the bracket II in a direction opposite to that portion upon which the reel II is supported and has aflixed thereto a grooved pulley II. The pulleys II and II are operatively connected by a belt Ii in such a manner that when the tape II is held taut between the tape engaging means and the reel the belt II will slip around the pulley II, thus precluding the likelihood of severing the tape. For this purpose the belt II has been found to give best results when composed of a continuous helical spring, since its yiel'dability provides the utmost of protection to the tape against severance and compensates for increasing diameter of the paper wound on the reel II.

In the employment of the tape actuating device of the present invention in the projection system schematically shown in Fig. l, the tape actuating device is properly placed in the system so as to maintain the alignment of the tape II therethrough. The tape is properly introduced into the tape engaging means as previously described, the end of the tape being inserted into one or the other 01' the anti-slip grooves II in the hub II. The tension of the spring II of the tape pressure means II is such as to insure a gripping contact between the pressure roller 15 and the knurled roller II. The purpose of the take-up device II normally is to take up the slack in the tape existing between the tape engaging means and the tape reel and normally has no eil'ect on the tape between the tape-engaging means I1 and the tape source II. While the tape actuating mechanism itself is still arrested, the take-up device nevertheless is continually operative due to the fact that the pulley II is constantly rotating with the constantly rotating shaft II to which it is afllxed. Due to the yieldability oi belt II and its slippage on pulley II the danger of imparting undue tension on tape II is removed.

When the operation of the recording device or ticker II is initiated upon the reception of code signals to effect printing on the tape II, the movement of the tape II for spacing is likewise initiated by the energization of electromagnet II which releases the ratchet wheel II for rotation. As previously observed, the energization of electromagnet II is effected by the closing of contact II through the coaction of lever II and cam II. Now, as long as the signals are received 'in regular succession the continuous rotation 01 ratchet wheel II (and hence sleeve II and gear II) will be uninterrupted by the periodic opening and closing of contact II, as previously described, and continuous rotation will likewise be imparted to the auxiliary shaft 61 through gear II to impart through the tape engaging means I'I continuous movement to tape II. In this manner, upon the regular and continuous reception of signals the tape II will be drawn smoothly through the recorder II, at a rate controlled thereby, and prointerval between code signals, the movement of the tape will automatically be arrested, since at the completion of the last cycle of operation of cam II the contact II will remain open and hence electromagnet II will be deenergized long enough for pawl II to effect the stoppage of ratchet 29, which occurs substantially simultaneously with the reception of the last code signal.

Manifestly, a tape actuating device has been provided which is responsive to code signalling and which produces a smooth and continuous movement to the tape. It is, of course, understood that the invention is capable of embodiment in many other forms than that specifically disclosed without departure from the spirit and scope of the invention as defined in the appended claims, or which may come within the range of equivalency.

What is claimed is:

"1. In a tape actuator, a retarded-stop device comprising a. normally moving element, an ex tensible member, means for operating said member to eflect the engagement thereof with said element, and means carried by said member to establish a limited movement of said element after said engagement.

2. In a tape actuating apparatus, a retardedstop device comprising a normally moving element, a yielding-stop member, means for operating said stop member to effect the engagement thereof with said element, and means carried by said member to establish a limited movement of said moving element after said engagement.

3. In a, tape actuating apparatus, a retardedstop device comprising a moving member, a stopping member, a protrusible element between said moving member and said stopping member,

means for operating said stopping member and said element jointly to effect engagement of said element with said moving member, and means to means.

5. In a tape actuating device for imparting continuous movement to a tape through a printing telegraph machine, a first means in the printing machine operable cyclically, a second means in the tape actuating device comprising a first component and a secondcomponent, said first component adapted to control the operation of said second component, and means controlled by said first means acting directly on said first component for rendering said first component ineflective while said first means is operating in regularly recurring cycles.

6. In combination, a telegraph printing mechanism selectively responsive to received permutation code combinations of current impulses operative to record characters on a tape, and means for moving said tape continuously durin'g the continued. reception of current impulses including a yielding-stop device effective for establishing the continuance of said movement during a predetermined interruption of the current impulses.

'1. In combination with a tape engaging device, means including a driving member and a driven member, means operable in regularly recurring cycles to control said first mentioned means to establish a predetermined period of coaction between said members during each cycle, and means carried by said first mentioned means operative upon cessation of operation of said cyclically operable means to eflect an additional period of coaction to establish thereby the inaction of said driving member.

8. In combination, a telegraph printing mechanism selectively responsive to received permutation code combinations of current impulses 0perative to record characters on a tape, and means ior moving said tape continuously and smoothly at a constant speedduring the continued reception oi! current impulses including a yielding-stop means efi'ective for controlling said movement during a predetermined interruption of the current impulses.

9. In a news exhibiting apparatus comprising a telegraph printing mechanism selectively re sponsive to received permutation code combinations 0! current impulses operative to record characters on a tape, means for moving said tape continuously during the continued reception of current impulses including an electromagnet energized during the reception of current impulses, and a yielding-stop means effective during a temporary deenergization or said electromagnet for controlling the continued movement of the tape.

10. In combination, a telegraph printing mechanism selectively responsive to received permutation code combinations of current impulses operative to record characters on a tape, and means for moving said tape continuously during the continued reception of current impulses including an electromagnet energized during the reception ofcurrent impulses, and a retarded-stop device embodying a yielding-stop. instrumentality efiective during .a temporary deenergizati'on .of said electromagnet for controlling the continued movement of the tape.

11. In combination, a telegraph printing mechanism selectively responsive to received permutation code combinations 01' current impulses operative to record characters on a tape, and means for moving said tape continuously during the continued reception of current impulses includinga yielding-stop membereflective for controlling said movement during a predetermined interruption oi the current impulses.

12. In a tape actuating apparatus, a retardedstop device comprising a normally moving element, a yielding-stop member, electromagnetic means for operating said stop member to efi'ect the engagement thereof with said element, and means carried by said member to establish a limited movement of said moving element after said engagement.

13. In combination with a tape actuating apparatus, a retarded-stop device comprising a moving member, a stopping member, a protrusible element between said'moving member and said stopping member, means for operating said stopping member and said element jointly to effect engagement of said element with said mov-' ing member, means operable in regularly recurring cycles for controlling said first means to effect a predetermined period 01 engagement of said moving member and said element, andmeans to establish a limited movement of said moving member after said engagement upon cessation oif operation of said cyclically operable means.

14. In combination, a recording device responsive to equal length lettercodes and capable of printing upon a movable tape, a tape actuator comprising a tape-engaging means for controlling the movement 01 said tape through said recording device, a retarded-stop device in said actuator for controlling said tape-engaging means comprising a moving element, a yieldingstop member, means for operating said member to eiIect engagement thereoi with said moving element, means in said recording device operable in cycles corresponding synchronously to said codes for controlling said first means to u effect a predetermined period of engagement of said member and said element during each cycle,

and means eiIective upon cessation of operation of said cyclically operable means to establish an additional period of engagement to effect the arrest of said moving element and said tape.

15. In a news exhibiting apparatus comprising a telegraph printing mechanism selectively responsive to received permutation code combinations of current impulses operative to record characters on a tape, means to impart continuous movement to said tape during continued reception of current impulses including a yieldingstop device, and electromagnetic means adapted to render said device effective for controlling said movement during a predetermined interruption of said current impulses.

16. In combination with a tape actuator, a retarded-stop device comprising a moving element, an extensible member, electromagnetic means for operating said member to effect engagement thereof with said moving element, means operable in regularly recurring cycles for controlling said first means to effect a predetermined period of engagement of said member and said element 7 during each cycle, and means to establish a limited movement 01 said element after said engagement upon cessation of operation 01' said cyclically operable means to effect the inaction 01 said moving element.

17. In a tape actuator, a first member operable under certain operating conditions, a second member operable under other operating conditions, means operable in regularly recurring eycles for eifecting a predetermined period of engagement of said first and said second members, and means to establish a supplemental period of engagement of said. first member and said second member upon cessation of operation of said first mentioned means to arrest the operation 01 said first member.

18. In a projection system, a recorder responsive to equal length letter codes, a tape, a tape actuator adapted to impart continuous movement to said tape, said tape actuator comprising a first member normally operable continuously to efiect the movement 01 said tape through said recorder, a second member operable to control the movement of said first member, means in said recorder operable in regularly recurring cycles corresponding synchronously to said codes adapted to control said second member to efiect a predetermined period of engagement of said second member and said first member during each cycle, and means effective upon cessation of operation of said cyclically operable means to establish a supplemental period of engagement to effect the arrest of said first member and said tape.

19. In combination with a tape-engaging device, means comprising a first component operable under certain operating conditions and a second component operable under other conditions, means operable in regularly recurring cycles to control said first mentioned means to efiect a' predetermined period of interaction between said components during each cycle, and means effective upon cessation of operation oi said cyclically operable means to establish an additional period of interaction to effect the inaction of said first component.

20. In a projection system, a recorder responsive to equal length letter codes adapted to make a record on a movable tape, a first means to pro- Ject said record, a second means adapted to control the movement of said tape simultaneously through said recorder and said first means, said second means comprising a first component operable under certain operating conditions and a second component operable under other conditions, means operable in cycles corresponding synchronously to said codes to control said second means to effect a predetermined period of interaction between said components during each cycle, and means eiIective upon cessation of operation of said cyclically operable means to establish a supplemental period of interaction to eflect the inaction of said first component to arrest the movement of said tape.

21. In combination, a telegraph mechanism selectively responsive to current impulses and operative to record characters on a tape, means for moving the tape continuously during the continued reception of current impulses, means operable concurrently with each complete operation of said mechanism and efiective cyclically therewith for controlling the operation of said tape moving means, and mechanical means efiective with said second mentioned means for es- "tablishing the continuance of the operation of inefiective with said element, and means efi'ective following the deenergization of said electromagnetic means for establishing the cooperation oi! said means with said element to efi'ect the limited movement of said element. I

23. In a tape actuating apparatus, a retardedstop device comprising a tape advancing element, means for driving said element continuously, an electromagnet energized periodically for controlling the continuous driving of said element, and a yielding-stop means efiective following the deenergization or said electromagnet for establishlng the continued driving of said element to a limited extent.

24. In combination, a telegraph mechanism selectively responsive to current impulses and operative to record characteris on a tape, means for moving the tape continuously during the continued reception of current impulses, a cam operated cyclically with said mechanism for controlling the operation of said tape moving means, and mechanical means effective with said cyclically operable camfor continuing the operation of said tape moving means for a predetermined period after said cyclically operable cam has lost its efiectiveness.

25. In combination, a telegraph printing mechanism selectively responsive to received permutation code combinations of current impulses operative to record characters on a tape, a tape moving means, cam controlled means for controlling the operation of said tape movingmeans, and mechanical means effective with said cam controlled means for controlling the continued movement of the tape for a predetermined period after said cam controlled means has lost its eifectiveness.

26. In combination, means for printing upon a record strip, means operable in each cycle of operation of said printing means, a continuously running motor, and mechanical means controlled by the second mentioned means for causing said motor to feed said strip, following a printing operation, a predetermined distance during a time of greaterthan a given duration wherein no subsequent printing operation occurs.

27. In combination, means for printing upon a record strip, a continuously running motor, means operable from and to normal position in each cycle of operation of said printing means, means for feeding said record strip, and mechanical means for causing said motor to operate said feeding means in response to operationof the second named means from normal position and for causing said feeding means to feed the record strip through a predetermined extent following the return of said second named means to normal position during a time of greater than a given duration wherein no subsequent printing operation occurs.

28. In combination, means for printing upon a record strip, a continuously running motor, and control means correlated with said printing means for causing said motor to feed said strip following a printing operation an additional amount whenever a succeeding printing operation fails to take place within a predetermined time, said control means comprising a member at the enduf a printing cycle.

19. In combinatiommeans for printing upon a-record strip, a continuously running motor, an element movable in each cycle of operation of the printing means, and control means correlated with said element for causing said motor to feed the record'strip continuously throughout a succession of printing operations the time intervals between which are less than a given duration and for insuring feeding of said strip by said motor a predetermined distance after completion. of a printing operation during a time of greater duration wherein no subsequent operation occurs, said control means comprising a member operable by said motor and a stop element limiting the extent of movement of said member.

30. In combination, means for printing upon a record strip, an element movable in each cycle of operation of said printing means, strip feeding means, control means responsive to movement of said element in a printing cycle for bringing said feeding means into action and for insuring continuation of the feeding means suiilciently to feed thestrip a predetermined distance following completion of said printing cycle, said control means comprising a member movable by said element into and out of position for operation by said feeding means in each printing cycle.

31. In combination, means for printing upon a record strip, an element movable away from and back to its normal position in each cycle of operation of said printing means, strip feeding means, a continuously running motor, and control means responsive to movement of said element from normal position for causing said motor to operate saidfeeding means and to continue feeding said strip a predetermined distance after the. return of said element to its normal position, said control means comprising a member movable by said motor and a stop element preventing movement of said member beyond a predetermined extent.

shiftableintopositionfor operation by said motor as. In combination, a ticker adapted to print characters successively on arecord strip in successive cycles of operation, record strip feeding means, and control means-correlated with said ticker for controlling said feeding means to cause said record strip to be fed continuously through a 1 series of cycles of operation of said ticker wheregin characters constituting a complete quotation printing thereof, said control means comprising a member shiftable into and out of position for operation by said feeding means,-and a stop element preventing movement of said member beyond a predetermined extent.

33. In combination. means for printing upon a record strip, means i'or feeding said record strip, means constantly'tending to operate said feeding means, a member shlftable into and out of operative relation to said feeding means, and means correlated with said printing means for controlling said member, and a stop element so related to said member as to be engaged thereby after movement thereof with said feeding means through a predetermined extent.

34, In combination, means for printing upon a record strip, means for feeding said record strip, a member driven by said feeding means, an element connectable to said member, means corre-' lated with said printing means for connecting said element with said member at the end of a printing cycle, a projection carried by said element, a stop member engageable by said projection upon operation of said element a predetermined extent by the first mentioned member for blocking operation of said feeding means, and spring means for returning said projection into a predetermined spaced relation from said stop member upon disengagement of said element from the first mentioned member.

WALTER. J. ZENNER. 

